16 FXMP25 User Guide
www.controltechniques.com Issue Number: 3
4.1 Electrical connections
When operating in stand alone mode, a relay should be provided to indicate to the
controller that the unit has tripped and to protect against an overspeed condition.
Figure 4-1 FXMP25 power connections
FXMP25
M
STORED CHA RGE
10 min
Mode /Reset
PE L1 L3 F1 F2
L1 L3
A1 A2
Supply
branch
fuses
Isolator
Optional
EMC
filter
Line
reactors
Armature
branch
fuses
Only required for
field weakening
applications in
stand alone mode
To armature controller
for field loss detection
in stand alone mode
If the voltage rating of the field is much lower than the supply voltage it is advisable to
use a transformer to reduce the supply voltage. This maximises the resolution of the
controller and prevents the possibility of excessive voltage being applied to the field
winding.
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